POLYCH^ETA OF THE L.M.B.C. DISTRICT. 253 



I confirm Cunningham and Ramage's statements and 

 deductions {he. tit.). Max Schiiltze* certainly described 

 the eggs and cocoons of S. ariniger in error for those o 

 Arenicola marina. His figures, if we remember them to 

 represent S. armiger, are accurate and beautiful. For 

 details of early embryology see notes under Arenicola 

 marina, page 249. 



Family. — CiRRATULiDiE. 



*Cirratidus tentacidatus, (Montagu). 



Attains to a large size at Puffin Island, where it is 

 commonly found under stones partly buried in mud near 

 low water mark. 



Cirratidus cirratus, (Miiller). 



Hab : P, M. 



During Easter, 1890, I collected a large number of 

 small specimens — about f — 1 in. in length — from narrow 

 clefts in the schist rocks of Port Erin Bay, Isle of Man. 

 The colour varied ; very beautiful were a few where the 

 entire body and long branchial filaments were intense 

 black, relieved by the tentacular filaments of the anterior 

 end being milk white. 



This species can be distinguished from C. tentacidatus 

 among other characteristics by (a) having a transverse 

 series of tentacular filaments on the 1st setigerous somite 

 and not on the 5th and 6th as in C. tentacidatus, (b) the 

 lateral filaments are fewer and usually originate at a 

 distance from the bases of the notopodia ; in the other 

 form they are more numerous and arise close to bases of 

 notopodia ; (c) annulations are much finer on buccal somite 

 in C. tentacidatus. 



Mr. Gibson enumerates, in this district two species of 

 this family, viz : — C. borealis, Lamarck, and G. cirratus, 



* Eutwick. von Arenicola •piscatorum, 1856. 



